EP1525510B1 - Dispositif d'affichage reflectif stereoscopique - Google Patents

Dispositif d'affichage reflectif stereoscopique Download PDF

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Publication number
EP1525510B1
EP1525510B1 EP03762829.4A EP03762829A EP1525510B1 EP 1525510 B1 EP1525510 B1 EP 1525510B1 EP 03762829 A EP03762829 A EP 03762829A EP 1525510 B1 EP1525510 B1 EP 1525510B1
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Prior art keywords
polarization
cells
electromagnetic radiation
extent
liquid crystal
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EP03762829.4A
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German (de)
English (en)
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EP1525510A1 (fr
Inventor
Peter A. Cirkel
Gerardus P. Karman
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Koninklijke Philips NV
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Koninklijke Philips NV
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13718—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/34—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 reflector
    • G02F2201/343—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 reflector cholesteric liquid crystal reflector

Definitions

  • the present invention relates to an apparatus as defined in the preamble of claim 1.
  • the present invention also relates to a reflective display comprising an apparatus of the aforementioned type and to a portable device comprising such a reflective display.
  • the present invention finally relates to a method of providing two images in a reflective display comprising an apparatus of the aforementioned type.
  • Prior art comprises several so called stereoscopic display devices, which accordingly endeavor to provide users with the sensation of a more realistic perception of different kinds of presented images such as 3D-movies (more formally known as stereoscopic movies).
  • Stereoscopic vision enhances a user's experienced degree of realism in comparison with standard, non-stereoscopic display devices, and would be an advantage in various applications of entertainment, such as movies, games etc., and education, such as flight simulators.
  • Stereoscopic vision would also be an advantage in various other applications, for instance, in so-called telemedicine wherein a remote medical expert's stereoscopic perception of a studied object such as a human organ would be an outstanding aid, both in various diagnostic applications and treatment applications.
  • the fundamental approach to providing a user with a sensation of stereoscopic vision i.e. the sensation of "depth" in an image, consists of providing two different images, one for each of the two eyes of an observer, said two different images corresponding to two perspective views, which preferably correspond to the perspective views the observer would normally acquire, should he or she study the depicted object from a certain distance using both eyes.
  • a display apparatus is often designed and arranged in such a way that the two eyes of an observer are able to see both images, which is why the current approach to providing the experience of stereoscopic vision necessitates the provision of eyewear to an observer, wherein the eyewear comprises means which somehow select the image which is intended for each eye, so that the appropriate perspective view is presented to each eye.
  • Another way of describing the current approach is to state that a single display apparatus presents two separate perspective views which are encoded, and that the user is provided with eyewear which decodes the perspective views so that each eye only receives one intended perspective view.
  • Prior art comprises apparatuses which are based on the encoding of the perspective views in two colors, for instance red and green, respectively, and the provision of eyewear comprising red and green filters, a solution which has the disadvantage of not being able to provide a stereoscopic experience in color.
  • Prior art furthermore comprises the alternating provision of two perspective views and eyewear comprising alternating shutters; an approach which requires an observer to use bulky, expensive equipment with fragile mechanics which will eventually break or that have an overwhelming weight which renders the usage of such equipment impossible during longer periods, and in addition requires computer power and fine-tuned clocks, especially when the two shutters of two observers would simultaneously observe the same two sequentially projected images.
  • prior art further comprises the alternating provision of two perspective views, which are encoded using polarization, i.e. the light of the two perspective views have a different polarization, and the provision of decoding eyewear comprising polarizing means.
  • a stereoscopic display device has been described in European patent application EP 0349692 , "Stereoscopic display”. Said application describes a stereoscopic display which is capable of displaying monochromatic or colored views of moving, three-dimensional scenes, and which comprises means for sequentially projecting alternate ones of successive pairs of substantially monochromatic images corresponding to right-eye and left-eye perspectives of the scene at a display rate which is sufficient to avoid flicker in the images.
  • a variable polarizer is used to circularly polarize alternate images in respective opposite senses synchronously at their projection rate.
  • the images are analyzed by highly transmissive eyewear comprising at least one pair of oppositely sensed cholesteric liquid crystal polarizing means tuned to the particular color wavelength of the images and disposed, one over each eye, to transmit only appropriately polarized images to the corresponding eye.
  • said apparatus is associated with several disadvantages, which render it inappropriate in several important applications, where stereoscopic vision would be an advantage.
  • said apparatus is a transmissive display and thus requires a backlight unit.
  • the apparatus comprises means for providing sequential projection of images, such means being often noisy and subjected to mechanical strain during operation.
  • these features result in increased power consumption, mass and volume, which implies that an implementation of such a stereoscopic display in a portable apparatus would be associated with many disadvantages.
  • the pictures from said apparatus are furthermore projected sequentially, which involves a regrettable quality reduction, because normal vision implies the continuous provision of images, i.e. the two eyes receive simultaneous images of the observed environment.
  • the underlying technology deprives the user of a possibility of adjusting the brightness, and since he or she is already wearing the compulsory eyewear, brightness reduction cannot be obtained by conventional methods, for instance by using sunglasses.
  • the apparatus is not suitable in cases where there are three intended receivers of three separate images, but is merely restricted to provision of the same stereoscopic experience, no matter how many observers there are.
  • liquid crystal displays have proved to be suitable for various applications which necessitate compactness and a low power consumption.
  • a liquid crystal display is a flat panel display device having advantages of small bulk, thin thickness and low power consumption.
  • LCDs have been used in connection with portable devices such as mobile telephones, portable computers, electronic calendars, electronic books, televisions or video game controls and various other office automation equipment and audio/video machinery, etc.
  • LCDs control an electric field which is applied to a liquid crystal material having a dielectric anisotropy to transmit or shut off light, thereby displaying a picture or an image, all in a fashion known per se as is recognized by those skilled in the art and as will be briefly explained.
  • display devices that generate light internally - such as electroluminiscence (EL) devices
  • CRT cathode ray tubes
  • LED light-emitting diodes
  • the LCD devices are largely classified into transmissive type devices and reflective type devices, depending on the method of utilizing light.
  • the transmissive type LCD includes a backlight unit for supplying light to the liquid crystal panel. It is, however, very difficult to make a transmissive LCD with a thin thickness and a low weight. Moreover, the backlight units of transmissive LCDs have an excessive power consumption.
  • reflective type LCDs include a reflective liquid crystal display panel that transmits and reflects natural light and peripheral light to and from the display screen without a backlight unit.
  • Reflective type LCDs are not suitable for any of the prior-art stereoscopic apparatuses, because all of them necessitate a transmissive display, inter alia, because of the reduction in the intensity of light which is inherent in the polarization process.
  • a basic liquid crystal display can easily be constructed by coating two separate thin sheets of a transparent material, such as glass or plastics, with a transparent metal oxide.
  • the metal oxide is applied in the shape of parallel lines on each of the separate sheets, and constitutes the row and column conductors of the LCD.
  • the rows and columns form a matrix of pixel elements.
  • the row conductors further serve to set up the voltage across a cell, which is necessary for the orientation translation.
  • orientation layer An alignment layer, sometimes referred to as orientation layer, is applied to each sheet.
  • the alignment layer may have undergone a rubbing process resulting in a series of microscopic grooves which are parallel and will assist in aligning the contained liquid crystal molecules in a preferred direction, with their longitudinal axes parallel to the grooves, which"anchors"the molecules along the alignment layers and helps the molecules between the alignment layers to twist.
  • One of the thin sheets is coated with a layer of polymer spacer beads. These beads maintain a uniform gap between the sheets of glass where the liquid crystals are eventually placed.
  • the two glass sheets are then placed together and the edges are sealed with epoxy. A corner is left unsealed so that the liquid crystal material can be injected under a vacuum. Once the display has been filled with liquid crystals, the corner is sealed and polarizers (the transparent layers with lines) are applied to the exposed glass surfaces.
  • the display is completed by connecting the row and column conductors to the driving circuitry which controls the voltage applied to various areas of the display.
  • the new display design provides a multitude of other features such as enhanced brightness control, the possible provision of several images to several receivers, and since the construction essentially includes two cells, it enables one of them to partially serve as a back-up unit in case the other cell is damaged or fails.
  • Several embodiments are described including those where the stereoscopic experience does not require a user to use eyewear. For the purpose of illustration, only light at one wavelength is discussed, but a full-color stereoscopic display in a portable device may be a commercial product incorporating the invention.
  • the electromagnetic radiation has a wavelength of between 300 nm and 800 nm (i.e. visible light) and said first polarization and said second polarization are circular polarizations of opposite handedness.
  • the arrangement can be optionally realized by arranging a polarization-altering element, preferably an appropriate halfwave plate, between said first and second cells which, in this case, are arranged to reflect circularly polarized light of the same handedness.
  • a polarization-altering element preferably an appropriate halfwave plate
  • the polarization-altering element could comprise a lens.
  • the first and second cells may optionally be at a distance from the optical element or from each other.
  • the first and second cells are preferably arranged to transmit a first and a second image to the first and the second eye of an observer.
  • the wavelengths of the light reflected by the respective two cells do not necessarily have to be the same.
  • said first and second cells are at least partially made of cholesteric texture liquid crystal (CTLC).
  • the present invention relates to a reflective display comprising an apparatus of the aforementioned type.
  • the present invention relates to a portable device comprising such a reflective display.
  • a portable display is preferably, but not necessarily, one of a mobile telephone, a portable computer, an electronic calendar, an electronic book, a television set or a video game control.
  • Fig. 1 is a schematic side view which illustrates a part of a liquid crystal display.
  • Fig. 1 is a schematic side view which illustrates a part of a liquid crystal display.
  • several dimensions such as the size of the molecules and the distances between the sheets of glass have been exaggerated, and the molecular structures of the liquid crystal mixtures have been simplified.
  • Two cells 10a and 10b are arranged on top of each other.
  • Thin sheets of glass 30a, 31a, 30b, 31b partially enclose each of the two cells as illustrated, from two opposite sides, which sides constitute essentially parallel planes.
  • Plastic substrates can be used instead of glass in order to reduce the parallax between the layers, because plastic substrates can be made thinner than glass.
  • Each cell 10a, 10b comprises its own set of column conductors 12a, 12b and row conductors 14a, 14b, which are implemented as indium tin oxide (ITO) lines, arranged on said sheets of glass 30a, 31a, 30b, 31b in accordance with prior-art LCDs.
  • ITO indium tin oxide
  • Alignment layers (also known as orientation layers) 32a, 33a, 32b, 33b, each of which may be alignment layer SE7511L from Nissan Chemical Industries, are arranged on the inside of each cell, as indicated in the Figures in order to orient the enclosed liquid crystals 34a, 34b in a preferred way.
  • Spacer balls (not shown), for instance SP-2050 from Sekisui Chemical, and seal material, e.g. XN21-S from Mitsui Chemical, are preferably used in accordance with prior-art liquid crystal displays to establish a uniform spacing between the thin sheets of glass 30a and 31a, which enclose the upper cell 10a (CTLC cell 1), and the thin sheets of glass 30b and 31b, which enclose the lower cell 10b (CTLC cell 2).
  • seal material e.g. XN21-S from Mitsui Chemical
  • Appropriate liquid crystal mixtures (CTLC materials) 34a, 34b are arranged in the upper and lower cells, respectively.
  • 34a is a liquid crystal mixture of BL87/BL88 10:90 w:w (Merck) for the upper cell 10a
  • 34b is a liquid crystal mixture of BL87/BL95 (Merck) 3:97 w:w (Merck) for the lower cell 10b, so that the two cells comprise liquid crystal mixtures which have opposite twists, i.e. they will reflect circularly polarized light of opposite handedness.
  • the CTLC material is a mixture of species. Basically, two species are necessary: a nematic host and a chiral dope.
  • the handedness of the dope determines the handedness of the CTLC, and the concentration of the chiral dope determines the wavelength (color) of the reflected light.
  • the concentration of the chiral dope determines the wavelength (color) of the reflected light.
  • an isolating layer will be required between the two cells to prevent crosstalk between the row and/or column conductors of the two cells, in particular crosstalk between the row conductor 14a and column conductor 12b. It is also imaginable that the lower substrate 31a of the upper cell 10a and the upper substrate 30b of the lower cell 10b might be implemented as one substrate, possibly comprising a shared column and/or row conductor.
  • Fig. 2 is a schematic side view of an embodiment of a liquid crystal display according to the invention, wherein two cells 10a, 10b which comprise CTLC-mixtures 34a, 34b are stacked on top of each other, and wherein an optical element 35 has been introduced between the two cells.
  • the optical element is illustrated at a distance from the upper and lower cells 10a, 10b.
  • the optical element 35 may be a polarization-altering element, such as a halfwave plate or another suitable optical component which allows the orientation of circularly polarized light to change, either from left-handed orientation to right-handed orientation, or vice versa.
  • a polarization-altering element such as a halfwave plate or another suitable optical component which allows the orientation of circularly polarized light to change, either from left-handed orientation to right-handed orientation, or vice versa.
  • liquid crystal mixtures which may be a liquid crystal mixture of BL87/BL88 10:90 w:w (Merck) mentioned before or any other suitable liquid crystal mixture.
  • the light reflected by each cell would have the same polarization if both cells comprised the same liquid crystal mixture.
  • the light reflected from one of the cells would pass through the optical element and thus change its polarization, thus resulting in the transmission of two images, one from each cell 10a, 10b, using light of two different polarizations.
  • the optical element could be a lenticular sheet, as described in US Patents US-6,064,424 or US-6,118,584 , which are herein incorporated by reference.
  • the embodiment described above would have the advantage that the light which is reflected from the two cells 10a and 10b would be reflected in slightly different directions.
  • these directions are arranged to coincide with the left and right eyes, respectively, of an observer, for instance at a distance of between 0 and 50 cm from the display, should the apparatus be implemented in a small portable apparatus such as a personal digital assistant (PDA) or a portable telephone, etc.
  • PDA personal digital assistant
  • Such an embodiment would enable a user to experience stereoscopic vision without eyewear.
  • the embodiment illustrated in Fig. 2 could be implemented as a large-scale display, such as a TV-set for two persons.
  • the angles in which the two cells reflect light could be arranged to coincide with the position of a first and a second observer, sitting at a distance from each other.
  • a display where only a part of the display has the embodiment as described with reference to Fig. 2 .
  • the lowermost part of a screen could be constructed according to the invention, allowing two observers to watch a TV-program and perceive two different subtitles in two different languages, or stock exchange data or news flashes as they are presented on many TV channels, where the lowermost space of the TV screen is allocated for stock exchange data, news updates, etc.
  • the optical element could comprise another optical element, for instance a halfwave plate as has been previously discussed with reference to Fig. 2 .
  • Fig. 3 is a schematic side view of another alternative embodiment of a liquid crystal display, in which in addition to the specification of Fig. 1 the cells are at a certain distance from each other, which implies that light can be reflected from slightly different angles from the first and second cells 10a, 10b, respectively.
  • Fig. 4 shows a schematic diagram of a typical prior-art arrangement for controlling and driving an electro-optic display device.
  • a liquid crystal display 10 has a matrix of pixels arranged vertically in columns and horizontally in rows. These pixels are located at the intersections of the column conductors 12 and the row conductors 14.
  • the column conductors 12 provide analog voltages to the pixels in each column, whereas the row conductors 14 provide a switching voltage to each associated row, permitting the column voltages to be supplied to the pixels of that row.
  • Rows are successively addressed in a prescribed order by means of a row decoder 16 which activates successive ones of a plurality of row drivers 18.
  • Column voltages are supplied by column driver circuits which are realized as track-and-hold circuits. These track-and-hold circuits receive a ramp voltage from the output buffer amplifier of a digital-to-analog converter (DAC) 22.
  • the DAC 22 receives successive digital numbers from a counter 24 that counts pulses produced by a clock 25. The count commences either from some minimum number or maximum number and increases or decreases steadily until it reaches, at the opposite end of the scale, a maximum or minimum number, respectively.
  • the DAC thus produces an increasing or decreasing ramp signal, in repetitive cycles, which approximates its digital input.
  • the output of the counter 24 is also supplied to a number of comparators 26, one for each column. This number is then compared in each comparator with a digital number representing the desired brightness level of a pixel in the associated column. The number representing this brightness level is stored in an associated pixel register 28 during each complete cycle of the system.
  • the respective comparator 26 When the count supplied by the counter 24 is equal to the digital number stored in a pixel register, the respective comparator 26 produces a pulse which is passed to a track-and-hold circuit for that column. Upon receiving such an enable pulse, an associated column driver stores a voltage equal to the instantaneous output of a ramp generator.
  • the voltages stored in the column driver circuits are supplied to a pixel in a particular row selected by the row drivers 18.
  • Each cell in an apparatus according to the invention could accordingly be controlled by such a prior-art arrangement for controlling and driving an electro-optic display device.
  • Fig. 5 is a graph illustrating the reflection vs. applied field strength from a liquid crystal mixture for a predefined wavelength.
  • the molecules in LCD pixels can switch between light and dark states, or somewhere in between (gray scale). How the molecules respond to a voltage is the important characteristic of this type of display.
  • the electro-distortional response determines the reflection of light through the cell.
  • Fig. 6 is a graph of the reflection in percentage as a function of the wavelength for illustrating the wavelength dependency of reflection properties for three different liquid crystal mixtures, namely: 90%/10% BL088/BL087, 80%/20% BL088/BL087 and 97%/3% BL095/BL087.
  • the demonstrated wavelength dependence of the reflected light for different mixtures can be exploited to construct full-color displays, such as RGB-displays, by creating a display, alternately filling the pixels with three different mixtures, each of which reflects essentially red, green and blue light, respectively.
  • Fig. 7 illustrates a scenario wherein an observer experiences simulated stereoscopic vision.
  • a display 40 according to the invention is arranged at a distance 41 from an observer (not shown).
  • the display 40 comprises two superimposed liquid crystal cells 10a and 10b as has been described previously with reference to Figs. 1 to 3 . Each of these cells is connected to the necessary electronics.
  • the upper cell 10a presents an image 42a and the lower cell presents an image 42b as indicated in Fig. 7 .
  • both images will appear on the display.
  • the images 42a, 42b are, however, coded using polarization, because the two cells 10a, 10b are arranged to reflect circularly polarized light of opposite handedness.
  • the eyewear 43 which for the purpose of illustration is depicted as glasses, is worn by the observer.
  • the left and the right eye of the observer are observing the screen through polarizing means 44a and 44b, respectively, which act as filter elements and are each highly transmissive to circularly polarized light of one handedness, but not transmissive to circularly polarized light of the opposite handedness. Consequently, only the image 42a created by the upper cell 10a is viewed by the left eye of the observer through the filter element 44a, and only the image 42b created by the lower cell 10b is viewed by the right eye of the observer through the filter element 44b.
  • the image 42a which is transmitted by the upper cell 10a is a perspective view, corresponding to a left-eye perspective
  • the image 42b which is transmitted by the lower cell 10b is a perspective view, corresponding to a right-eye perspective
  • the result is thus two separate perspective views for the left and the right eye, respectively, and hence the user experiences stereoscopic vision.
  • the two respective perspective views could be an identical image, which could be experienced by a user no matter whether he or she is wearing the eyewear which is compulsory in the stereoscopic feature.
  • the described stereoscopic feature of the invention necessitates eyewear comprising filter elements which may be implemented, for example, as glasses, the lenses of which comprise appropriate polarizing means.
  • filter elements which may be implemented, for example, as glasses, the lenses of which comprise appropriate polarizing means.
  • These can be made in several ways, for instance, by means of absorbing polarizing films for LCD, in combination with lambda/2 retardation films for LCD.
  • the orientation of the ordinary and extraordinary axis relative to the absorption axis of the polarizing film determines which handedness is absorbed and which handedness is transmitted.
  • These components can be bought at Nitto-Denko or Sumitomo Chemical.
  • a film of CTLC can be made which reflects light of one circular polarization and transmits the other one. These films are, however, relatively expensive.
  • the eyewear is implemented as glasses, but it is also possible to implement the eyewear as contact lenses.
  • Fig. 8 illustrates that the embodiments which have been (partially) illustrated in Figs. 2 and 3 and previously described with reference to the aforementioned Figures do not require a user to use decoding eyewear to experience stereoscopic vision. This is because the cells 10a, 10b of the apparatus are arranged so that the images which are formed by the two cells propagate in slightly different directions as indicated in the Figure, resulting in their coincidence with the left and the right eye of a user at a certain distance.
  • the Figure illustrates a deviating optical element such as a lenticular sheet 35 arranged between the cells 10a, 10b to deviate the light which is reflected from the lower cell 10b in a direction slightly different from the direction in which the light from the upper cell 10a is reflected. It is nevertheless also perceivable to imagine a similar effect using the embodiment described with reference to Fig. 3 , because this would imply that the two cells are observed from slightly different distances and thus from different angles.
  • a deviating optical element such as a lenticular sheet 35 arranged between the cells 10a, 10b to deviate the light which is reflected from the lower cell 10b in a direction slightly different from the direction in which the light from the upper cell 10a is reflected.
  • Fig. 9 illustrates a user scenario wherein the apparatus according to the invention is used to provide several users with different images.
  • a large liquid crystal display 50 is arranged on a wall, for instance, in the passenger compartment of an aircraft, within view of three passengers 52a, 52b, 52c who are situated in different parts of the aircraft and face the liquid crystal display.
  • the display comprises three different layers (not shown), each reflecting light having a certain wavelength and polarization properties. For the purpose of illustration, each of the three cells projects one of the images 51 a, 51b and 51c.
  • decoding elements 53a, 53b, 53c are arranged in front of each observer, said decoding elements being arranged to essentially transmit only light from one of the cells to each observer. Consequently, the observer 52a only perceives the image 54a, the observer 52b only perceives the image 54b and the observer 52c only perceives the image 54c as indicated in the Figure.
  • the decoding elements are illustrated as screens, but it would also be possible to implement them as eyewear such as glasses which have been described previously.
  • a display according to the invention may additionally comprise a backlight unit, or it may be implemented as a portable or large-scale transmissive display.
  • each eye will receive the light reflected from both layers of the apparatus.
  • the apparatus according to the invention has several advantages over the prior art. Only one cell could be used at a time, and the second cell could be used as a backup unit in case the first cell would fail.
  • the display device according to the invention As brightness is an important feature in liquid crystal display devices, it would be advantageous to use the display device according to the invention as a display device which provides a user with the option of selecting the degree of brightness. This could be practically realized by instructing the pixels in only one layer to reflect light when a low brightness is desired and instructing the pixels in both layers to reflect light when a higher brightness is desired. Since the layers reflect light which is circularly polarized with opposite handedness, there is no interference between the reflected light, thereby resulting in a sharp image.
  • This method of providing different levels of brightness could be extended to apparatuses comprising more than two superimposed cells.
  • a number N of cells (N being at least one but not equal to the total number of superimposed cells) could be manipulated into reflecting light, and when a higher brightness is desired, a number N+1 of superimposed cells could be manipulated into reflecting light.
  • the apparatus according to the present invention may be realized, for example, as a separate, stand-alone unit, or may alternatively be included in, or combined with, a mobile terminal for a telecommunication network, such as GSM, UMTS, GPS, GPRS or DAMPS, or another portable device of an existing type, such as a Personal Digital Assistant (PDA), palmtop computer, portable computer, electronic calendar, electronic book, television set or video game control, as well as various other office automation equipment and audio/video machinery, etc.
  • a mobile terminal for a telecommunication network such as GSM, UMTS, GPS, GPRS or DAMPS
  • PDA Personal Digital Assistant
  • palmtop computer portable computer
  • portable computer electronic calendar
  • electronic book electronic book
  • television set or video game control as well as various other office automation equipment and audio/video machinery, etc.

Claims (12)

  1. Appareil d'affichage réfléchissant comprenant :
    une première cellule de cristal liquide (10b), ladite première cellule comprenant une pluralité de premiers éléments, lesdits premiers éléments pouvant être commandés entre un état non réfléchissant, dans lequel un rayonnement électromagnétique ayant une première polarisation est réfléchi à un premier degré, et un état réfléchissant, dans lequel ledit rayonnement électromagnétique ayant une première polarisation est réfléchi à un second degré, ledit second degré étant supérieur audit premier degré ; et
    une seconde cellule de cristal liquide (10a) superposée à la première cellule, ladite seconde cellule comprenant une pluralité de seconds éléments, lesdits seconds éléments pouvant être commandés entre un état non réfléchissant, dans lequel un rayonnement électromagnétique ayant une seconde polarisation est réfléchi à un troisième degré, et un état réfléchissant, dans lequel ledit rayonnement électromagnétique ayant une seconde polarisation est réfléchi à un quatrième degré, ledit quatrième degré étant supérieur audit troisième degré,
    dans lequel lesdits premier et second éléments sont aménagés de sorte que ladite première polarisation soit différente de ladite seconde polarisation,
    caractérisé en ce qu'au moins une lentille est aménagée entre lesdites première et seconde cellules (10a, 10b) et lesdites première et seconde cellules (10a, 10b) en combinaison avec la au moins une lentille sont aménagées pour fournir simultanément différentes images au premier et au second oeil d'un observateur, dans lequel les différentes images sont des vues en perspective créant un effet 3D lorsqu'elles sont observées.
  2. Appareil selon la revendication 1, dans lequel le rayonnement électromagnétique a une longueur d'onde comprise entre 300 nm et 800 nm.
  3. Appareil selon la revendication 1 ou la revendication 2, dans lequel ladite première polarisation et ladite seconde polarisation sont des polarisations circulaires de sens opposés.
  4. Appareil selon la revendication 1, dans lequel un élément modificateur de polarisation (35) est aménagé entre lesdites première et seconde cellules (10a, 10b).
  5. Appareil selon la revendication 4, dans lequel ledit élément modificateur de polarisation (35) est une lame demi-onde.
  6. Appareil selon la revendication 1, dans lequel lesdites première et seconde cellules (10b, 10a) sont à une certaine distance (36) l'une de l'autre.
  7. Appareil selon la revendication 1, dans lequel lesdits premier et second rayonnements électromagnétiques ont différentes longueurs d'onde.
  8. Appareil selon la revendication 1, dans lequel au moins l'une desdites première et seconde cellules (10b, 10a) est formée au moins en partie d'un cristal liquide de texture cholestérique (CTLC).
  9. Affichage réfléchissant comprenant un appareil selon la revendication 1.
  10. Dispositif portable comprenant un affichage réfléchissant selon la revendication 9.
  11. Dispositif portable selon la revendication 10, dans lequel ledit dispositif est l'un quelconque d'un téléphone mobile, d'un ordinateur portable, d'un calendrier électronique, d'un livre électronique, d'un appareil de télévision ou d'une commande de jeu vidéo.
  12. Procédé de fourniture de deux images différentes dans un affichage réfléchissant selon la revendication 9, caractérisé en ce que le procédé comprend les étapes consistant à :
    manipuler les premiers éléments pour réfléchir un rayonnement électromagnétique sous la forme d'une première image (42b), ladite première image étant constituée d'un rayonnement électromagnétique ayant une première polarisation,
    manipuler simultanément les seconds éléments pour réfléchir un rayonnement électromagnétique sous la forme d'une seconde image différente (42a), ladite seconde image étant constituée d'un rayonnement électromagnétique ayant une seconde polarisation,
    dans lequel ledit procédé comprend l'étape consistant à :
    aménager ladite lentille et lesdites première et seconde cellules (10a, 10b) pour fournir lesdites première et seconde images différentes (42a, 42b) dans différentes directions vers le premier et le second oeil d'un observateur, dans lequel les images différentes sont des vues en perspective créant un effet 3D lorsqu'elles sont observées.
EP03762829.4A 2002-07-08 2003-06-18 Dispositif d'affichage reflectif stereoscopique Expired - Lifetime EP1525510B1 (fr)

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EP02077731 2002-07-08
EP02077731 2002-07-08
EP03762829.4A EP1525510B1 (fr) 2002-07-08 2003-06-18 Dispositif d'affichage reflectif stereoscopique
PCT/IB2003/002405 WO2004006005A1 (fr) 2002-07-08 2003-06-18 Afficheur stereoscopique reflectif

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EP1525510B1 true EP1525510B1 (fr) 2016-02-03

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EP (1) EP1525510B1 (fr)
JP (1) JP4758099B2 (fr)
KR (1) KR101016250B1 (fr)
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AU (1) AU2003232412A1 (fr)
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Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0403933D0 (en) * 2004-02-21 2004-03-24 Koninkl Philips Electronics Nv Optical path length adjuster
JP4849399B2 (ja) * 2005-12-30 2012-01-11 エルジー ディスプレイ カンパニー リミテッド 視野角制御可能な液晶パネル及び液晶表示装置
KR20090017499A (ko) * 2006-08-09 2009-02-18 샤프 가부시키가이샤 액정 표시 장치 및 시야각 제어 모듈
JP4981394B2 (ja) * 2006-09-28 2012-07-18 株式会社ジャパンディスプレイイースト 表示装置
US7656527B2 (en) * 2006-11-07 2010-02-02 Deka Products Limited Partnership Method and apparatus for determining concentration using polarized light
TWI350401B (en) * 2006-11-27 2011-10-11 Chimei Innolux Corp Liquid crystal display device
JP5399615B2 (ja) * 2007-01-31 2014-01-29 株式会社ジャパンディスプレイ 表示装置
EP2215102B1 (fr) 2007-10-01 2016-02-17 Ionis Pharmaceuticals, Inc. Modulation antisens de l'expression du récepteur 4 du facteur de croissance des fibroblastes
CN101408692B (zh) * 2007-10-11 2010-07-14 宣茂科技股份有限公司 立体液晶显示器
EP2146237A1 (fr) * 2008-07-17 2010-01-20 Barco NV Système optique stéréoscopique doté d'un seul projecteur avec des valves ultra légères dans le chemin lumineux
TWI328714B (en) 2008-10-09 2010-08-11 Au Optronics Corp Switchable two and three dimensional display
USRE45394E1 (en) 2008-10-20 2015-03-03 X6D Limited 3D glasses
USD624952S1 (en) 2008-10-20 2010-10-05 X6D Ltd. 3D glasses
USD603445S1 (en) 2009-03-13 2009-11-03 X6D Limited 3D glasses
USD666663S1 (en) 2008-10-20 2012-09-04 X6D Limited 3D glasses
CA2684513A1 (fr) 2008-11-17 2010-05-17 X6D Limited Lunettes de vision tridimensionnelle ameliorees
US8542326B2 (en) 2008-11-17 2013-09-24 X6D Limited 3D shutter glasses for use with LCD displays
US20100245999A1 (en) * 2009-03-30 2010-09-30 Carlow Richard A Cart For 3D Glasses
KR101529981B1 (ko) * 2008-11-27 2015-06-18 삼성디스플레이 주식회사 표시장치 및 이의 제조방법
IT1392623B1 (it) * 2008-12-23 2012-03-16 Luxottica Srl Dispositivo visualizzatore di immagini criptate visibili solo attraverso un filtro polarizzatore e procedimento per realizzarlo.
USD646451S1 (en) 2009-03-30 2011-10-04 X6D Limited Cart for 3D glasses
USD672804S1 (en) 2009-05-13 2012-12-18 X6D Limited 3D glasses
USD650956S1 (en) 2009-05-13 2011-12-20 X6D Limited Cart for 3D glasses
CN101995693B (zh) * 2009-08-18 2013-03-20 鸿富锦精密工业（深圳）有限公司 立体图像显示器
USD671590S1 (en) 2010-09-10 2012-11-27 X6D Limited 3D glasses
USD669522S1 (en) 2010-08-27 2012-10-23 X6D Limited 3D glasses
USD692941S1 (en) 2009-11-16 2013-11-05 X6D Limited 3D glasses
US8168084B2 (en) 2009-12-18 2012-05-01 Vanderbilt University Polar nematic compounds
USD662965S1 (en) 2010-02-04 2012-07-03 X6D Limited 3D glasses
JP2011186331A (ja) * 2010-03-10 2011-09-22 Seiko Epson Corp 液晶装置および液晶メガネ
US8963996B2 (en) * 2010-05-05 2015-02-24 Samsung Electronics Co., Ltd. Communication of stereoscopic three-dimensional (3D) video information including an uncompressed eye view video frames
USD664183S1 (en) 2010-08-27 2012-07-24 X6D Limited 3D glasses
US9151958B2 (en) * 2010-09-02 2015-10-06 Raytheon Company Display system using a pair of polarized sources with a 3-D display mode and two 2-D display modes
US9046729B2 (en) * 2011-03-24 2015-06-02 The Hong Kong University Of Science And Technology Cholesteric liquid crystal structure
EP2721156B1 (fr) 2011-06-16 2016-12-21 Ionis Pharmaceuticals, Inc. Modulation antisens de l'expression du récepteur 4 du facteur de croissance fibroblastique
KR101559196B1 (ko) 2012-02-07 2015-10-13 주식회사 엘지화학 액정 렌즈 패널
USD711959S1 (en) 2012-08-10 2014-08-26 X6D Limited Glasses for amblyopia treatment
US9110304B2 (en) * 2012-10-23 2015-08-18 Au Optronics Corporation Two-dimensional and three-dimensional switchable liquid crystal display device and displaying method thereof
TWI472802B (zh) * 2012-11-15 2015-02-11 Au Optronics Corp 顯示裝置
US8976323B2 (en) * 2013-01-04 2015-03-10 Disney Enterprises, Inc. Switching dual layer display with independent layer content and a dynamic mask
US9418215B2 (en) * 2013-04-30 2016-08-16 Microsoft Technology Licensing, Llc Optical security enhancement device
US9514316B2 (en) * 2013-04-30 2016-12-06 Microsoft Technology Licensing, Llc Optical security enhancement device
US10001654B2 (en) * 2016-07-25 2018-06-19 Disney Enterprises, Inc. Retroreflector display system for generating floating image effects
JP6857384B2 (ja) * 2016-11-24 2021-04-14 国立大学法人大阪大学 光学素子

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4670744A (en) * 1985-03-14 1987-06-02 Tektronix, Inc. Light reflecting three-dimensional display system
US5537144A (en) * 1990-06-11 1996-07-16 Revfo, Inc. Electro-optical display system for visually displaying polarized spatially multiplexed images of 3-D objects for use in stereoscopically viewing the same with high image quality and resolution
US6559903B2 (en) * 1991-11-27 2003-05-06 Reveo, Inc. Non-absorptive electro-optical glazing structure employing composite infrared reflective polarizing filter
US5402191A (en) * 1992-12-09 1995-03-28 Imax Corporation Method and apparatus for presenting stereoscopic images
JPH07120792A (ja) * 1993-08-31 1995-05-12 Toshiba Corp 液晶表示素子
GB9513658D0 (en) 1995-07-05 1995-09-06 Philips Electronics Uk Ltd Autostereoscopic display apparatus
US6064424A (en) 1996-02-23 2000-05-16 U.S. Philips Corporation Autostereoscopic display apparatus
GB2315561A (en) * 1996-07-19 1998-02-04 Sharp Kk Liquid crystal device
JPH10221644A (ja) * 1997-02-05 1998-08-21 Canon Inc 立体画像表示装置
JP3147156B2 (ja) * 1997-11-18 2001-03-19 富士ゼロックス株式会社 表示記憶媒体、画像書き込み方法および画像書き込み装置
WO1999042889A1 (fr) * 1998-02-20 1999-08-26 Power Beat International Limited Afficheur multicouche et procede permettant d'afficher des images sur ledit afficheur
JP3599089B2 (ja) * 1998-11-11 2004-12-08 富士ゼロックス株式会社 多色表示装置
JP2000321408A (ja) * 1999-05-10 2000-11-24 Dainippon Printing Co Ltd 光反射フィルム
US6781666B2 (en) * 1999-07-16 2004-08-24 Minolta Co., Ltd. Liquid crystal display and method to manufacture the same
JP2002287135A (ja) * 2001-03-28 2002-10-03 Minolta Co Ltd 反射型液晶表示素子

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US7394506B2 (en) 2008-07-01
CN100565305C (zh) 2009-12-02
AU2003232412A1 (en) 2004-01-23
TW200403937A (en) 2004-03-01
CN1666142A (zh) 2005-09-07
WO2004006005A1 (fr) 2004-01-15
US20050254113A1 (en) 2005-11-17
EP1525510A1 (fr) 2005-04-27
JP4758099B2 (ja) 2011-08-24
KR101016250B1 (ko) 2011-02-25
KR20050017103A (ko) 2005-02-21
JP2005532584A (ja) 2005-10-27

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